A large part of my pain has always been around my left shoulder blade. It can feel like the problem is buried underneath or beside the scapula instead of coming from my neck.
The pain also extends into the left side of my neck, upper back, shoulder, and arm. My left arm feels weak and tires quickly, especially when I hold my baby while standing.
Because the shoulder-blade pain is so noticeable, I have repeatedly wondered how my C5-C6 disc could be responsible. If the pain is in my back, why would doctors keep looking at a nerve root in my neck?
The short answer is that cervical nerve-root irritation can cause pain around the shoulder blade. However, muscles, shoulder problems, joints, and other nerves can cause pain in the same area.
In my case, the shoulder-blade pain is one piece of a larger pattern that includes arm weakness, pain traveling away from my neck, and repeated EMG findings that reportedly point toward C5-C6.
The Quick Answer
Yes, C5-C6 nerve irritation can be associated with pain around the shoulder blade, upper back, shoulder, and arm.
A problem at the C5-C6 disc level most commonly affects the C6 nerve root. However, pain patterns overlap, and C5 involvement is especially known for causing pain near the inner border of the shoulder blade and outer upper arm.
Shoulder-blade pain alone cannot identify the affected nerve root. Doctors also examine strength, sensation, reflexes, imaging, and EMG results.
Where Is the Shoulder Blade Pain Located?
The shoulder blade, also called the scapula, is the large flat bone on each side of the upper back.
Pain can be felt:
- Along the inner edge closest to the spine
- Underneath the shoulder blade
- Above the shoulder blade
- Between the shoulder blades
- Near the outer edge toward the shoulder joint
- Across the muscles covering the scapula
The location provides clues, but it does not automatically reveal the cause.
My pain is mainly on the left side. It can spread from beside my neck down toward the shoulder blade and across part of my upper back. At other times, it feels connected to the shoulder and arm.
That wider distribution is one reason the doctors have not treated it as an isolated sore spot in my back.
How Can a Nerve in the Neck Cause Pain Near the Shoulder Blade?
Cervical nerve roots leave the spinal cord through openings between the vertebrae in the neck. They then contribute to branching networks of nerves that serve the shoulder, upper back, arm, and hand.
When a cervical nerve root is irritated, the brain may interpret the signals as pain somewhere along the connected region.
The painful area does not need to be located directly on top of the damaged or irritated nerve root.
The American Academy of Orthopaedic Surgeons explains that cervical radiculopathy can produce pain that radiates into the shoulder or arm along with weakness and numbness.
Pain around the scapula can be part of that radiating pattern.
A C5-C6 Disc Problem Usually Involves the C6 Nerve Root
The names make this more confusing than necessary.
C5-C6 describes the disc located between the C5 and C6 vertebrae. The nerve root most commonly affected by a problem at that disc level is the C6 nerve root.
The C5 nerve root usually exits one level higher near the C4-C5 disc.
The usual relationship is:
- A C4-C5 disc problem may affect the C5 nerve root.
- A C5-C6 disc problem may affect the C6 nerve root.
- A C6-C7 disc problem may affect the C7 nerve root.
My recent comparison of C5 vs C6 nerve pain symptoms explains the difference between the name of a spinal level and the name of the nerve root.
My surgeon replaced the disc at C5-C6. When another doctor says the EMG still shows a C5-C6 problem, I want to know whether he means the C5-C6 surgical level, the C6 nerve root, or an overlapping C5-C6 radiculopathy pattern.
Which Cervical Nerve Roots Cause Shoulder-Blade Pain?
Several cervical nerve roots can potentially be associated with pain near the shoulder blade.
C5 nerve-root pain
The classic C5 pattern may include pain along the inner border of the shoulder blade, the shoulder, and the outer upper arm.
C5 problems may also weaken muscles involved in raising or rotating the arm.
The American Academy of Physical Medicine and Rehabilitation describes C5 radiculopathy as potentially causing pain around the medial scapular border and lateral upper arm.
C6 nerve-root pain
C6 symptoms more commonly extend through the outer arm and forearm toward the thumb and index finger.
However, C6 radiculopathy does not have to skip the shoulder-blade region. Pain can begin around the neck or scapula before extending farther down the arm.
C6 may also affect muscles involved in bending the elbow, extending the wrist, and stabilizing the shoulder.
C7 nerve-root pain
C7 radiculopathy is also commonly associated with pain near the inner portion of the shoulder blade. It may continue through the back of the arm and forearm toward the middle finger.
That is one reason shoulder-blade pain cannot determine the exact cervical level by itself.
Pain Patterns Are Not as Clean as the Diagrams
Online diagrams often show each nerve root controlling a neat strip of skin.
Real pain does not always behave that way.
A person may experience pain in only part of the expected area. Another person may feel pain in several overlapping regions. Some people have weakness without much pain or numbness.
The American Academy of Physical Medicine and Rehabilitation notes that expected cervical pain patterns may occur in only around 54 percent of patients in some studies.
That means shoulder-blade pain cannot be dismissed just because it does not perfectly match a colorful nerve diagram.
My symptoms do not stay inside one narrow line. They involve the left side of my neck, scapular area, shoulder, upper back, and arm.
The pattern still provides useful information, but it must be interpreted with the examination and testing.
Why the Pain Can Feel Like It Is Under the Shoulder Blade
Pain around an irritated nerve root can feel deep and difficult to pinpoint.
Instead of feeling like a surface injury, it may seem buried underneath the scapula. I can rub or press on the area without always reaching the source of the sensation.
That deep pain may come from more than one mechanism.
Referred pain from the cervical spine
Joints, discs, and other structures in the neck can refer pain toward the shoulder blade without necessarily producing a classic radiculopathy.
Cervical nerve-root irritation
An irritated nerve root may create radiating pain that reaches the scapular region and arm.
Tight or overworked muscles
Muscles around the shoulder blade may become painful while trying to stabilize a weak or uncomfortable arm.
Altered shoulder mechanics
If I hold the shoulder higher, brace the arm, or avoid certain movements, the muscles may work differently and develop painful trigger points.
Several of these problems can happen at the same time.
Why My Pain Gets Worse When I Let My Arm Hang
One of my stranger symptoms is that the pain can worsen when I relax my left arm and let it hang naturally.
Supporting or lifting the shoulder can sometimes make the arm and shoulder-blade pain feel better.
I wrote about why my pain worsens when I relax my arm because it seemed backward. Relaxing should feel better, but it often increases the pulling sensation.
The weight of the arm may increase tension through irritated nerve tissues or place more demand on the shoulder stabilizers.
Supporting the arm may reduce that downward pull.
Doctors sometimes refer to a similar response as the shoulder-abduction relief sign when placing the hand on or above the head reduces cervical radicular symptoms. My movement is not necessarily a textbook version of that sign, but the positional change is still worth reporting.
Why Carrying Weight Makes the Shoulder-Blade Pain Worse
Holding my baby with my left arm requires much more than elbow strength.
The shoulder blade must remain stable against the rib cage while the shoulder, upper arm, elbow, forearm, and wrist support the weight.
If the nerve supply to part of that system is impaired, other muscles may work harder to compensate.
After roughly five minutes, the pain can become horrible.
It may spread across:
- The left side of my neck
- The upper-back and scapular area
- The shoulder
- The upper arm
- Other parts of the arm
Rapid fatigue can come from true nerve-related weakness, pain limiting how much force I can produce, deconditioned muscles, or poor shoulder-blade control. The article on arm weakness after cervical disc replacement applies these possible causes to difficulty using the arm during sustained activities.
I do not assume one mechanism explains all of it.
Why Carrying a Backpack Can Trigger Similar Pain
A backpack places downward and backward pressure on the shoulder girdle.
That can irritate muscles around the scapula, change shoulder position, and increase tension across already sensitive nerve structures.
I have dealt with shoulder pain that worsens when carrying a backpack, which I described in my article about what I learned after years of backpack-related shoulder pain.
That does not prove the backpack compresses the cervical nerve root itself. It shows that loading and positioning the shoulder can strongly influence the symptoms.
This could happen because the neck and shoulder are mechanically connected even when the original problem is closer to the spine.
Could the Shoulder Itself Still Cause the Pain?
Yes. Not all shoulder-blade pain comes from the neck.
Possible shoulder-related causes can include:
- Rotator-cuff irritation or tearing
- Shoulder impingement
- Biceps tendon problems
- Arthritis
- Labral injuries
- Scapular movement problems
- Muscle strains
- Bursitis
- Instability
- Repetitive overuse
Shoulder problems often cause pain with specific arm movements. Night pain, weakness, popping, clicking, and difficulty raising the arm can also occur.
I have popping with certain left-arm movements, which made me wonder whether something inside the shoulder was being missed.
However, I saw a shoulder doctor who did not find a significant shoulder problem that explained my overall symptoms.
That evaluation makes the cervical nerve explanation more relevant, but it does not make every possible shoulder or scapular condition impossible.
How Neck Pain and Shoulder Pain Can Be Separated
No single home test can reliably separate these problems, but the symptom behavior may provide clues.
Clues that may point toward the neck
Pain may change when the neck is extended, rotated, or held in one position. Symptoms may travel from the neck or shoulder blade down the arm. Numbness, tingling, reflex changes, or weakness across several muscles may also suggest cervical radiculopathy.
Clues that may point toward the shoulder
Pain may be strongly tied to particular shoulder movements. Reaching overhead, reaching behind the back, lying on the affected shoulder, or rotating the arm may reproduce the symptoms.
Clues that may involve scapular muscles
The painful spot may be tender when pressed. Repetitive use, prolonged posture, or holding weight may create a deep muscular ache. The pain may improve with rest, heat, or changing shoulder position.
These clues overlap. A cervical nerve problem can weaken shoulder muscles, and shoulder pain can cause the neck to tighten.
The Hospital for Special Surgery explains that cervical nerve compression is one possible cause of referred shoulder pain even when the original source is not inside the shoulder.
Can Muscles Around the Shoulder Blade Become Painful From Nerve Damage?
Yes.
The shoulder blade depends on several muscles to stay stable and move normally.
These include:
- Trapezius
- Rhomboids
- Serratus anterior
- Levator scapulae
- Supraspinatus
- Infraspinatus
- Other rotator-cuff and shoulder muscles
These muscles do not all receive their nerve supply from one cervical root. However, weakness or pain in one part of the system can change how the others work.
If my arm does not move or support weight normally, the muscles around the scapula may tighten, tire, or compensate.
This can create a combination of nerve pain and muscle pain in almost the same location.
That may help explain why ibuprofen gives me the best overall relief. It can reduce inflammatory and musculoskeletal pain even though it does not repair a damaged nerve.
Can C5-C6 Cause Pain Without Numbness in the Hand?
Yes.
A person does not need thumb numbness or constant tingling to have C5-C6 nerve-root irritation.
Radiculopathy may affect motor fibers more noticeably than sensory fibers. It may also produce pain in the shoulder or upper arm without a clear hand pattern.
Some people have mainly:
- Shoulder-blade pain
- Deep shoulder aching
- Muscle weakness
- Rapid arm fatigue
- Pain with certain neck positions
- Intermittent rather than constant numbness
A mainly sensory radiculopathy may also produce pain without showing clear abnormalities on an EMG. My EMG is abnormal, but that does not mean every symptom must fit the classic sensory map.
Can C5-C6 Cause Pain Only in the Shoulder Blade?
It can potentially contribute to pain that is felt mainly around the scapula.
However, isolated shoulder-blade pain has many possible causes and should not automatically be blamed on a cervical nerve.
The cervical explanation becomes stronger when scapular pain appears with other findings such as:
- Neck pain
- Pain radiating into the arm
- Numbness or tingling
- Measurable weakness
- Reflex changes
- Symptoms that change with neck position
- EMG evidence of radiculopathy
- Imaging showing a matching cervical problem
I have several of those additional clues, including left-arm weakness and repeated EMG findings.
Why an EMG Can Help With Shoulder-Blade Pain
An EMG cannot measure pain underneath the scapula.
Instead, it tests the electrical activity of selected muscles and the nerves controlling them.
If several abnormal muscles receive input from the same cervical root through different peripheral nerves, the pattern may support cervical radiculopathy.
If abnormalities follow only one peripheral nerve, the problem may be located farther from the spine.
Testing a paraspinal or other proximal muscle can add information about whether the problem is close to the nerve root.
My explanation of how an EMG finds a pinched nerve in the neck goes into more detail about how doctors work backward from the muscle pattern.
The EMG does not identify every possible cause of scapular pain, but it can show that the shoulder-blade symptoms occur alongside measurable nerve-related changes. The broader limits of EMG testing are explained in what an EMG can and cannot show.
Why a Good-Looking Artificial Disc Does Not Explain Everything
My surgeon says the C5-C6 artificial disc looks good.
That is reassuring because it suggests there is no obvious problem with its position on the X-rays he reviewed.
However, the disc looking good does not automatically explain whether:
- The nerve fully recovered after surgery
- Chronic nerve damage remains
- The nerve is still inflamed
- Scar tissue affects the nerve
- Another level contributes to the pain
- Scapular muscles have developed a secondary problem
- My shoulder mechanics changed during years of pain
X-rays, MRI scans, EMGs, and physical examinations answer different questions.
I do not consider the surgeon wrong because the disc looks good. I also do not consider my pain unexplained simply because the implant has not visibly failed.
Could a Targeted Nerve Root Block Help Identify the Source?
My EMG doctor has recommended a more targeted injection near the suspected cervical nerve root.
If numbing that nerve root temporarily reduces the familiar shoulder-blade, shoulder, and arm pain, the response may support the cervical nerve as a meaningful source.
I explained how that diagnostic process may work in my guide to cervical selective nerve root blocks.
The injection may not eliminate every painful area.
If the arm pain decreases but a tender muscular spot remains beside the scapula, that could suggest more than one pain source. If the entire familiar pattern temporarily improves, the nerve root may connect more of the symptoms than I realized.
I have not received this targeted injection yet, so I cannot report whether it helps me.
What I Want My Doctors to Examine
Scapular movement
I want someone to watch how both shoulder blades move when I raise and lower my arms. Abnormal movement may reveal weakness or compensation that is difficult to notice while sitting still.
Individual muscle strength
Testing the entire arm as simply “strong” or “weak” is not specific enough. The deltoid, biceps, wrist extensors, rotator-cuff muscles, and scapular stabilizers may provide different clues.
Neck position
I want to know whether extending or rotating my neck reliably changes the shoulder-blade and arm symptoms.
Shoulder range of motion
Pain caused by moving the shoulder may help identify a local shoulder or muscular component.
Reflexes and sensation
Changes in reflexes or sensation may support the nerve root suggested by the weakness and EMG.
All three EMG reports
Comparing the reports may show whether the nerve injury appears active, chronic, stable, or improving.
Questions Worth Asking About Shoulder-Blade Nerve Pain
Which nerve root best matches my scapular pain?
C5, C6, and C7 patterns can overlap, so the answer should include more than the pain location.
Does my C5-C6 disc level mean the C6 nerve root is affected?
That is the usual anatomical relationship, but my actual imaging and EMG should be reviewed.
Could I have both cervical radiculopathy and scapular muscle pain?
A nerve problem can cause weakness and compensation that makes surrounding muscles painful.
Why does supporting my arm reduce the pain?
Changing the shoulder position may reduce nerve tension or decrease the workload on painful stabilizing muscles.
Does the popping suggest a shoulder problem?
Popping can occur for several reasons. It should be considered alongside pain, weakness, motion, and the shoulder examination.
Could physical therapy help the scapular pain?
A therapist may help identify muscle weakness and movement problems, but the program should account for the cervical nerve findings.
What would the targeted injection tell us?
The doctor should explain which part of my pain is expected to change if the correct nerve root is treated.
When Shoulder-Blade Pain Needs Prompt Attention
Most shoulder-blade pain is not an emergency, but certain symptoms need quicker medical evaluation.
I would seek prompt care for:
- Rapidly worsening arm or hand weakness
- New loss of coordination
- New balance or walking problems
- Weakness involving both arms or the legs
- Loss of bowel or bladder control
- Severe pain after a fall or other neck injury
- Chest pressure, shortness of breath, sweating, or unexplained nausea
- Fever with worsening neck or upper-back pain
- Sudden severe pain unlike the usual pattern
Pain near the left shoulder blade can occasionally come from conditions unrelated to the spine, including heart, lung, or abdominal problems. New symptoms should not automatically be blamed on an old neck diagnosis.
How My Shoulder-Blade Pain Fits the Larger Pattern
My shoulder-blade pain is real, but its location does not prove that the problem starts underneath the scapula.
The pain is part of a larger left-sided pattern involving my neck, upper back, shoulder, and arm. I also have weakness and rapid fatigue when holding weight.
My shoulder evaluation did not reveal a major problem that explains everything. My artificial disc reportedly looks good, yet three EMGs have continued giving my doctors information about the cervical nerve-root area.
The most likely explanation may not be as simple as “neck pain” or “shoulder pain.”
I may have cervical nerve-root dysfunction producing radiating pain and weakness while the muscles around my shoulder blade become painful from compensation and altered movement.
The upcoming targeted injection may help separate those pieces, but I will not know until I actually receive it.
For now, the shoulder-blade location does not rule out C5-C6 nerve pain. In my case, it may be one of the most important parts of the cervical radiculopathy pattern.
Written by Daxon Weaver, who shares his real experiences with cervical disc replacement, lumbar fusion, shoulder-blade pain, chronic nerve symptoms, and EMG testing on Spine Recover. This article describes one patient’s experience and is not a substitute for individualized medical care.
